<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>
  <style>
    .wrap {
      width: 100%;
      display: flex;
      margin: 0.2rem 0 0 0;
      position: relative;
    }
    
    /*左侧的导航样式*/
    .nav_left {
      width: 21.1875rem;
      overflow: scroll;
    }
    
    .nav_left::-webkit-scrollbar {
      display: none;
    }
    
    .nav_content {
      white-space: nowrap;
      padding: 0 0.7rem;
    }
    
    .nav_content span {
      display: inline-block;
      padding: 0.4rem 0.6rem;
      font-size: 0.875rem;
    }
    
    .nav_content .active {
      border-bottom: 2px solid #7f4395;
      color: #7f4395;
    }
    
    .nav_left,
    .down {
      float: left;
    }
    
    /*右侧导航部分*/
    .down {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    
    .gray {
      color: gray;
      display: inline-block;
      vertical-align: middle;
    }
  </style>
</head>
<body>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="xm" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="nl" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="nn">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table
        border="1"
        cellpadding="10"
        cellspacing="0"
      >
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr  v-for="(i,e) in arr">
          <td>{{e+1}}</td>
          <td>{{i.name}}</td>
          <td>{{i.age}}</td>
          <td>{{i.sex}}</td>
          <td>
            <button @click="fn(i.name)">删除</button>
            <button @click="xg(e)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        state:false,
        nn:'男',
        xm: '',
        nl:'',
        hh:'',
        arr:[
        {name:'王佳杰',age:18,sex:'男'},
        {name:'OOR',age:18,sex:'男'},
        {name:'五月天',age:18,sex:'男'},
        {name:'赵雷',age:18,sex:'男'}
          ]
      },
      
      methods: {
        fn(id){
        // console.log(id);
        this.arr = this.arr.filter(i => i.name!==id )
        },
        add(){ 
          if(this.state){
          console.log('这是编辑案例');
          this.arr[this.hh].name =  this.xm
          this.arr[this.hh].age  =   this.nl
          this.arr[this.hh].sex  =    this.nn

          this.state =false
          } else{
            this.arr.push({
                name:this.xm,
                age:this.nl,
                sex:this.nn,          
            })
          }
            this.xm=""
            this.nl=''
        },
        xg(e){
          // 数据回显  
          this.xm = this.arr[e].name
          this.nl = this.arr[e].age
          this.nn = this.arr[e].sex
          this.state= true
          this.hh = e
        }
      }
    })
  </script>
</body>
</html>